Detectives: Two armed men rob Walmart in Atascocita

Some scary moments at a Walmart in Atascocita. Late Tuesday night, two men with assault rifles ran into the store, robbed it and sped away. The search is now on for those gunmen.

Deputies have a vague description of the suspects, so they're urging residents in the area to be viligant because they're considered to be armed and dangerous.

Harris County investigators say the armed robbery at the Atascocita Walmart may have been an inside job.

"To see if these two suspects had any type of information that came from inside the store that only employees would know; that's certainly one of the angles that our investigators will be looking at," Harris County Sheriff's Office Deputy Thomas Gilleland said.

Two men armed with a long gun and a rifle walked in at 11pm, the exact time when employees take the cash from every register and put into one cart.

"As they were doing this for each cash register, the two males entered the store," Gilleland said.

The robbers -- wearing cloths to conceal their faces -- made off with a large amount of cash in just a few minutes. Shoppers are now concerned about their safety.

"Well I've seen cops on every block basically and I didn't really know what was going on until we came up here to Walmart and we saw like four cop cars blocking off the entrance," shopper Charles Hines said.